Method and system of predicting temperature distribution in a battery pack

A system, comprising:

• one or more hardware processors;
• a communication interface;
• and
• a memory storing a plurality of instructions, wherein the plurality of instructions cause the one or more hardware processors to:
• obtain a plurality of battery data as input, wherein the plurality of battery data comprises temperature at one or more specified locations of a battery pack, an initial temperature of the battery pack, a coolant flow rate, a coolant temperature, an ambient temperature, load on an electric vehicle in which the battery pack is deployed, and current and voltages from the battery pack;
• preprocess the obtained battery data to generate a pre-processed data;
• and
• determine a) a heat transfer rate between a coolant and the battery pack, wherein the heat generation rates within the battery pack are non-uniform, and b) value of a heat flux jump by considering an adiabatic region where the coolant flows through a region in which there is no heat exchange with the battery pack due to a serpentine geometry of the battery pack, wherein determining the heat transfer rate and the value of the heat flux jump comprises:
• collecting from the pre-processed data, information on a preliminary temperature distribution across the battery pack based on a historical information with respect to the initial temperature of the battery pack;
• determining value of a heat flux based on the preliminary temperature distribution, using a convolution technique;
• determining value of a heat transfer coefficient for each of a plurality of battery pack—coolant intersections, based on the determined heat flux value;
• determining a value of a lumped conductance for the battery pack, based on the determined value of the heat transfer coefficient, wherein the pre-processed data, the determined temperature distribution, the determined value of heat flux, the determined value of heat transfer coefficient, and the determined value of a lumped conductance;
• and
• determining a) the heat transfer rate between a coolant and the battery pack, and b) the value of the heat flux jump by considering an adiabatic region, based on the determining a value of a lumped conductance.

One or more non-transitory machine-readable information storage mediums comprising one or more instructions which when executed by one or more hardware processors cause:

• obtaining a plurality of battery data as input, wherein the plurality of battery data comprises temperature at one or more specified locations of a battery pack, an initial temperature of the battery pack, a coolant flow rate, a coolant temperature, an ambient temperature, load on an electric vehicle in which the battery pack is deployed, and current and voltages from the battery pack;
• preprocessing the obtained battery data to generate a pre-processed data;
• and
• determining a) a heat transfer rate between a coolant and the battery pack, wherein the heat generation rates within the battery pack are non-uniform, and b) value of a heat flux jump by considering an adiabatic region where the coolant flows through a region in which there is no heat exchange with the battery pack due to a serpentine geometry of the battery pack, wherein determining the heat transfer rate and the value of the heat flux jump comprises:
• collecting from the pre-processed data, information on a preliminary temperature distribution across the battery pack based on a historical information with respect to the initial temperature of the battery pack;
• determining value of a heat flux based on the preliminary temperature distribution, using a convolution technique;
• determining value of a heat transfer coefficient for each of a plurality of battery pack—coolant intersections, based on the determined heat flux value;
• determining a value of a lumped conductance for the battery pack, based on the determined value of the heat transfer coefficient;
• and
• determining a) the heat transfer rate between a coolant and the battery pack, and b) the value of the heat flux jump by considering an adiabatic region, based on the determining a value of a lumped conductance.